Essentiality of Confirmation Test for Primary Hyperaldosteronism
- سال انتشار: 1398
- محل انتشار: بیست و یکمین همایش سالانه و چهارمین همایش بین المللی آسیب شناسی و طب آزمایشگاه و هشتمین همایش بین المللی شاخه ایرانی آکادمی بین المللی پاتولوژی
- کد COI اختصاصی: ACPLMED21_030
- زبان مقاله: انگلیسی
- تعداد مشاهده: 432
نویسندگان
QUMS
چکیده
Primary aldosteronism, also known as primary hyperaldosteronism (PHA) or Conn s syndrome, refers to the excess production of the hormone aldosterone from the adrenal glands, resulting in low renin levels. This abnormality is caused by hyperplasia or tumors. Primary hyperaldosteronism is among the most common causes of secondary hypertension. Many suffer from fatigue, potassium deficiency and high blood pressure, which may cause poor vision, confusion or headaches. A confirmatory test was performed on 312 ambulatory patients with severe or resistant arterial hypertension who had an aldosterone-to-renin ratio (ARR) of > 30 or aldosterone levels of > 150 ng/L. The confirmatory testing was performed with identical laboratory examinations before and after infusion of saline for four hours and after withdrawal of potentially interfering medications. Patients with confirmed PHA were more likely to be men (70.3% versus 54.9%), had lower serum potassium (3.8 versus 4.1 mmol/L) and plasma renin activity (0.7 versus 3.2), higher serum aldosterone (268 versus 229 ng/L) and ARR (177 versus 95), higher office systolic blood pressure (147 versus 143 mmHg). Significant predictors of PHA were plasma renin assay (PRA) < 0.63 , aldosterone > 165 ng/L (AUC 0.60), ARR > 43, serum potassium < 4.0 mmol/L and the number of used antihypertensive drugs > 4. When applied to the cohort, combined recommended cut-off values determined by international guidelines that further testing was not needed (aldosterone > 200 ng/L and potassium < 4.0 mmol/L) had an overall accuracy for diagnosis of primary hyperaldosteronism of only 69.0%. A combination of ARR > 43 and serum potassium < 4 mmol/L had overall accuracy for primary hyperaldosteronism of 75.6%کلیدواژه ها
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